Okay my bad. I read it too fast. I was thinking you meant 28kbs. Haha!
Anyway, you 28 down should be enough. You may have bad wiring past your D-Mark to your Router?
Thanks, but I think the issue is with the wireless signal having to go thru a floor and a couple walls over the course of about 20'. I have a pretty good USB wireless that can get the 5G signal also, but my W/10- 64 bit PC (4.0 Ghz Ryzen 3200G CPU; 16GB RAM - thank God) losses it, so I stick with the 2.4.
Note also that the https://www.megapath.com/speedtestplus/ connects to a server n NY, while I am in MA, and it takes a couple tries before it will connect.
Just tried it again and it reports
DOWNLOAD 30.67Mbps
UPLOAD 17.75Mbps
LATENCY 30ms
JITTER 3 ms